Rapid Micro Biosystems Inc. Class ARPID
13F holders, Q4 2025 (December 31)At the end of Q4 2025, 42 institutions reported holding Rapid Micro Biosystems Inc. Class A (RPID) in their 13F filings, up 13 from Q3 2025. 14 opened new positions and 2 sold out. The largest holders were Bain Capital Life Sciences Investors, LLC ($24.5M), ABG-WTT Global Life Science Capital Partners GP Ltd ($5.4M) and Vanguard Group Inc. ($2.8M). 4 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Rapid Micro Biosystems Inc. Class A
- CUSIP
- 75340L104
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 14 | $2.3M |
| Exits | 2 | $112K |
All 13F filers, Q3 2025 → Q4 2025: 1,062,982 shares bought and 1,296,679 shares sold, net −233,697 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 42 holders
| Bain Capital Life Sciences Investors, LLC | 1.88% | No change | 8,434,560 | $24.5M |
| ABG-WTT Global Life Science Capital Partners GP Ltd | 35.62% | No change | 1,848,296 | $5.4M |
| Vanguard Group Inc. | 0.00% | Add +1.4% | 978,781 | $2.8M |
| Advent International, L.P. | 0.03% | No change | 577,777 | $1.7M |
| Parkman Healthcare Partners LLC | 0.10% | Reduce -61.2% | 354,465 | $1.0M |
| Schonfeld Strategic Advisors LLC | 0.01% | Reduce -45.5% | 352,433 | $1.0M |
| Geode Capital Management, LLC | 0.00% | Add +6.3% | 217,568 | $631K |
| Susquehanna International Group, LLP | 0.00% | Add +195.0% | 172,235 | $499K |
| Evernest Financial Advisors, LLC | 0.10% | Reduce -37.6% | 125,000 | $469K |
| BlackRock, Inc. | 0.00% | Reduce -67.6% | 156,666 | $454K |
| Citadel Advisors | 0.00% | New | 126,539 | $367K |
| 683 Capital Management, LLC | 0.03% | New | 120,773 | $350K |
| Millennium Management | 0.00% | New | 116,502 | $338K |
| Renaissance Technologies | 0.00% | Add +4.9% | 115,627 | $335K |
| Jane Street Group, LLC | 0.00% | Add +176.1% | 105,301 | $305K |
| Sei Investments Co. | 0.00% | New | 93,616 | $271K |
| State Street Corp. | 0.00% | No change | 91,474 | $265K |
| Informed Momentum Co LLC | 0.02% | New | 77,182 | $224K |
| Marshall Wace, LLP | 0.00% | New | 62,911 | $182K |
| Essex Investment Management Co. LLC | 0.03% | No change | 62,326 | $181K |
| Dimensional Fund Advisors LP | 0.00% | Add +1.0% | 56,182 | $162K |
| Goldman Sachs Group Inc. | 0.00% | New | 55,306 | $160K |
| Northern Trust Corp. | 0.00% | Reduce -15.2% | 40,487 | $117K |
| Qube Research & Technologies Ltd | 0.00% | New | 33,099 | $96K |
| Morgan Stanley | 0.00% | Add +52.7% | 31,389 | $91K |
| Point72 Asset Management | 0.00% | New | 30,367 | $88K |
| Nano Cap New Millennium Growth Fund L P | 0.06% | — | 25,000 | $73K |
| Barclays PLC | 0.00% | New | 24,859 | $72K |
| OMERS ADMINISTRATION Corp | 0.00% | New | 24,400 | $71K |
| Fifth Lane Capital, LP | 0.06% | New | 17,700 | $51K |
| American Century Companies Inc. | 0.00% | No change | 16,922 | $49K |
| Lighthouse Investment Partners, LLC | 0.00% | New | 15,720 | $46K |
| Legato Capital Management LLC | 0.00% | No change | 14,684 | $43K |
| Osaic Holdings, Inc. | 0.00% | Add +4666.7% | 14,300 | $41K |
| Bank of America Corp. | 0.00% | Add +86093.3% | 12,929 | $37K |
| BNP Paribas Financial Markets | 0.00% | Add +206.1% | 11,100 | $32K |
| Citigroup Inc. | 0.00% | Add +483100.0% | 4,832 | $14K |
| Resources Management Corp. /CT/ | 0.00% | No change | 500 | $1K |
| Tower Research Capital LLC (TRC) | 0.00% | New | 317 | $919 |
| JPMorgan Chase & Co. | 0.00% | No change | 109 | $316 |
| UBS Group AG | 0.00% | Reduce -85.9% | 41 | $119 |
| SBI Securities Co., Ltd. | 0.00% | Reduce -11.8% | 15 | $44 |
"% of holder's portfolio" is RPID's weight in each manager's 13F, not the share of Rapid Micro Biosystems Inc. Class A the manager owns.